brAun Atelier A1 repair

Noise & crackle in the speakers of my brAun A1 Atelier amplifier, bought for ∆í595 in 1981. Initial thought: electrolytic capacitors are old, dried out, and may be leaking. Removed the pre out/main in connectors (back side of A1): symptom persists. Analysis: problem located in main amplifier (Endverst√§rker). Opened the A1: everything looks good, except …